Edit the premise to say "the rich generally become richer and the poor generally become poorer" or if you want to make a specific point, try "our current system concentrates wealth into fewer hands" or something like that.

It is extremely difficult to break off from the cycle that our society created, and as long as a huge percent of our resources are controlled by the rich, there will be limited opportunities for the less rich to climb up the chain. And so it will continue, with only a handful breaking free.